Quick coupling



April 2, 1940. F. A. MCDONALD QUICK COUPLING Filed June 21, 1938 INVENTOR. DON4D & MMMZ@ ATTORNEYS.

fqzvg Patented Apr. 2, 1940 I v LQUIOK COUPLIVNG I e I E 4 !l"A-M s f s o. Calif." I \Application June 21, 1938,Serial No. 2 4,88

Myinvention relates to improvements in a: quick coupling, and itconsists of the combina-f tions, constructions and arrangements hereinafter describedand claimed. r

An objectv of. invention isto provide a quickcoupling in which the :tail pie'ceand the body member-may be quickly. attached to each other regardless oi therotationalangular positionthey assume with each other. Another vital feature istheprovisionjof novel meanscarried by the tailipiece' and the body for. interconnecting the two together ina mannerthatawill' prevent rotational movement between them, when they are connectedbya coupling sleeve or handle. The body member is preferably attached to a pipe while the tail piece is usually connected to a hose. Any tendency of the hose to rotate the tail piece in the coupling will be prevented by the means which looks the tail piece to the bodyand prevents rotational movement between the parts. In this way, the couplingsleeve or handle will not be accidently rotated to free the two parts of the coupling A further object of my invention is to provide a device of the type described which is simple in construction and which is durable and efficient for the purpose intended.

, Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed'out in the appended claims.

My invention is illustrated in the accompanying drawing formin ga part of this application, in which Figure 1 is a longitudinal section through the device; I

Figure 2 is an end view of the tail piece; Figure 3 is an end view of the body; and Figure 4 is a side elevation of on a reduced scale.

In carrying out my invention, I provide a coupling consisting of a body A, a tail piece B, and a sleeve 0. The body A. has a cylindrical member I internally threaded at 2 for a portion of its length. One end of the cylinder I has an annular, outwardly extending flange 3 and a reduced portion 4 of the cylinder extends beyond the flange and is provided with one or more fingers 5. In Figure 3, I show three fingers 5. The reduced portion 4 constitutes a longitudinally extending flange. A gasket 6 is placed on the face of the flange 3 and is concentric with the reduced cylindrical portion or flange 4.

The I coupling sleeve handle 0 is rotatably mounted on the body A and has a cylindrical zciaimsi agged-175) the body shown be readily understood.

-.recesses with the projections.

18 have pointed, ends Na and therefore the fin portion l rotatably mounted on the peripheral Kai:

edge of theflange 3., and also rides on the cylindri'cal portion 1.. Thesleeve l hasan inwardly extending flange" 8v that rotatably bears against the flang'e'z3; A split rings is received in a groove l0" formed in .the cylinder I and this ring bears against the opposite side of the flange 8' to that contacted by the. flange'S. 'This permits rotational movement of the handle C on the cylinder I, but prevents longitudinal movement. The handle C carries a plurality of projectionsor'hand'grip portions II and I have shown three of these projections in the drawing. it l .The sleeve 1 extends beyond theflange Sand is designed to receive 'a flange l2 carried by the tail piece B. t Figure 2 shows the flange; ll of the tail piece B as being provided with recesses l3 and Figure 3 shows the handle C provided withinwardly extending projections l4 that are adapted to pass through the recesses 13 of the member C'when the parts A and B are coupled together. The projections [4 have shoulders I5 for engagingv with the flange l2 after the tail piece B has been'moved into contact with the gasket 6 and, then rotated. The flange 12 has cam edges l2a so inclined that as, the handle 0' 'is rotated with respect to the member B in;a

clock-wise direction when looking at Figure 3, the projections or lugs will ride upon the cam edges l2a and will frictionally bind the tail piece B to the body A. In this way, a water-tight seal .is formed between the two parts.

' The tail piece B has a threaded, portion 16 for receiving a hose [1. 'The tail 'piece also has inwardly and longitudinally extending proj ections I8 spaced from each other to provide longitudinally extending recesses or grooves I9 and designed to receive the fingers 5. Figure 2 shows twelve projections [8. It is obvious that this nu qber maybe changed at will.

From theforegoing description of the various parts of the device, the operation thereof. may

The body A is normally connected to a fixed pipe 20. The hose I! with the 'tail piece B is now moved into engagement with the body A, after the handle C has been rotated'into'a position to align the lugs M with the recesses l3. It is easier to rotate the handle C rather than to rotate or twist the hose H in order to align the The projections gers 5 will be guided into the recesses l9 regard less of the rotational position the tail piece B assumes with theflbody A. In other words, the

tail piece B and hose I! need not be rotated to any appreciable extent when coupling the tail piece to the body A. When the fingers 5 enter the recesses I9, they will lock the body A to the tail piece B and prevent any rotational movement between the parts.

The handle C may now be rotated for bringing the lugs I4 into frictional engagement with the cam edges [2a. In rotating the handle C, the operator, can grasp two of the projections H Whichjis .easiertliani; grasping the sleeve which is of a large diameter. It will be noted that the engagement of the fingers'5 with the projections 18 will prevent the hose I1 and the tail piece B from rotating with respect to the body A an'd this in turn Will prevent the tailpiece Bfrom rotating the handle C and causing the parts to become accidently uncoupled. therefore has the advantage of quick coupling without the disadvantage of becoming accidently uncoupled. Thefiange' 4 cooperates with the gasket 6 to form a Water-tight fitbetween The device" at least one finger integral with said body, a tai1- piece with means for its permanent a-ffixation to said hose, an annular series of spaced projections on said tailpiece, into any one space of which the finger. is instantly emplacable by axially confronting the body and tailpiece thereby to resist turning of the tailpiece relatively to the body by any twisting of the hose in use, a sleeve swiveled ontothe body and having several equispaced simple-projections,- and a flange on the tailpiecaperiodically recessed to :admitpassage of the projections and having cam edges for said projections to ride upon a turn of the sleeve to keep the finger confined to the occupied space.

2. A coupling comprising a body with means for the afiixation ofone of its ends to a pipe, a flange approximately at the free end of said body,

said flange-being the-virtual base of at least one projecting finger, a sleeve swiveled onto the body and'havi'ng several equi-spaced simple projections, atailpiece' with means for. the aflixation of one. ofiits endstoashose, a flange. on the free end. of s'aid'tailpiece, periodically recessed tov admit passage of the projections-.-and. having cam edges fobsaid projections .to ride .upon. by a. turn of the .sleeve,xand. an :annular series -.of spaced projectionsin said.tailpiece..made integral with.

the tailpiece, set backirom the rim..of the flange and located within/the confines: of the. tailpiece flange; thus .to aiiord .a rigid interlock-for said finger. whenthe finger. is emplac'edl in an arbitrarily selected .space;

' Y FRANK A. MCDONALD. 

